EP0562448A1 - Covered pressure-sensitive self-adhesive carrier and method of manufacturing it - Google Patents

Covered pressure-sensitive self-adhesive carrier and method of manufacturing it Download PDF

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Publication number
EP0562448A1
EP0562448A1 EP93104413A EP93104413A EP0562448A1 EP 0562448 A1 EP0562448 A1 EP 0562448A1 EP 93104413 A EP93104413 A EP 93104413A EP 93104413 A EP93104413 A EP 93104413A EP 0562448 A1 EP0562448 A1 EP 0562448A1
Authority
EP
European Patent Office
Prior art keywords
adhesive
self
covered
film
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP93104413A
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German (de)
French (fr)
Inventor
Ekkehard Beer
Tobias Rentzsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
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Hoechst AG
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Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of EP0562448A1 publication Critical patent/EP0562448A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • C09J7/403—Adhesives in the form of films or foils characterised by release liners characterised by the structure of the release feature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B2037/148—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers whereby layers material is selected in order to facilitate recycling of the laminate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/244—All polymers belonging to those covered by group B32B27/36
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B32B2307/518—Oriented bi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2423/00—Presence of polyolefin
    • C09J2423/10—Presence of homo or copolymers of propene
    • C09J2423/106—Presence of homo or copolymers of propene in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2427/00—Presence of halogenated polymer
    • C09J2427/006—Presence of halogenated polymer in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2467/00—Presence of polyester
    • C09J2467/006—Presence of polyester in the substrate

Definitions

  • the invention relates to self-adhesive and pressure-sensitive materials (adhesive tapes) which are provided on their self-adhesive surface with a cover which can be easily removed, contains no silicone, is high-strength and can be recycled.
  • Self-adhesive and pressure-sensitive materials e.g. adhesive tapes
  • adhesive tapes often have to be reversibly covered on the (adhesive) active surface during the manufacturing process, transport and storage in order to prevent them from sticking to themselves.
  • covers allow, for example, a targeted adjustment of the rolling resistance, which is of crucial importance, in particular, when machine use of adhesive tape rolls in automatic packaging systems.
  • Usual reversible covers usually contain silicone-containing coatings that are adhesive-repellent. Such silicone-containing covers, however, have a number of disadvantages. On the one hand, it cannot be generally ruled out that traces of the silicone stick to the adhesive layer when the cover is pulled off, as a result of which the adhesion of the adhesive in contact with a new substrate is reduced. On the other hand, the silicones stand in the way of recovery of the pure material used as the carrier (cover). Such siliconized materials can only be disposed of via landfill or incineration. Thermal forming is ruled out for silicone-containing material.
  • the object was therefore to provide a cover for adhesive tapes which is in no way inferior in terms of its property profile to siliconized carriers, but which does not have the disadvantages of the siliconized carriers described above.
  • the invention further relates to a method for producing the covered carrier and the use of an embossed embossing film as a cover film for self-adhesive carriers.
  • Pressure-sensitive self-adhesive carriers are well known and are described, for example, in EP-A-0 028 771. Embossable polyester films are also known (EP-A-0 115 033). In the unpublished German application P 41 33 142.7 it is proposed to use the embossed embossing film according to EP-A-0 115 033 as a release film for the production of surface-structured, decorative layers. There is no indication of a possible use of such embossed foils as a cover for self-adhesive supports.
  • Covering in the sense of the invention is understood to mean a material which protects the adhesive layer of an adhesive-finished carrier and can, if desired, be removed without at least substantially damaging the adhesive layer and / or the carrier.
  • a carrier is understood to be a structure which is provided at least on one surface with a self-adhesive coating which the carrier is coated with by simply exerting pressure (pressure-sensitive) More or less firmly connects the substrate.
  • carrier is understood to mean an adhesive tape film which usually consists of a single- or multi-layer thermoplastic such as polyvinyl chloride, polypropylene or polyethylene terephthalate and is coated on one side with a pressure-sensitive adhesive.
  • Pressure-sensitive here means that the adhesive effect is achieved by simply applying pressure without an increase in temperature or additives to be added (self-adhesive).
  • the basis of the invention is an embossable, stretched and heat-set multilayer film made of polyesters with different melting points, comprising two outer polyester layers made of polyethylene terephthalate, between which a lower-melting polyester layer made of copolyesters with ethylene terephthalate and ethylene isophthalate units is embedded.
  • Such an embossable multilayer film is described in EP-A-0 115 033, to which reference is expressly made here. It can, for example, be laminated onto a carrier, for example a book cover, as an unembossed film and then embossed under the influence of pressure and temperature, which creates a desired relief-like pattern.
  • the embossable polyester film is a multilayer film, the characteristic features of which can be seen in the fact that the film is biaxially stretched and that the intermediate layer consists of a copolyester which contains between 5 and 95% by weight of ethylene isophthalate units. It is preferred that the outer polyester layer from which the embossing is made is thinner in thickness than the second outer polyester layer.
  • the embossability is very good, that there is no tendency to stick to the tool during the embossing process and that higher temperatures can be used during the embossing process, so that the embossing depth also The load remains at higher temperatures.
  • Polyethylene terephthalate with a melting temperature between 240 and 260 ° C. is preferably used for the outer layer and a copolyester with a melting temperature between 190 and 230 ° C. is used for the intermediate layer.
  • the multilayer film preferably has an asymmetrical structure; the outside polyester layer from which the embossing is made is thinner than the second outside polyester layer, which is arranged opposite the side from which the embossing is made.
  • the thickness of the multilayer film is 5 to 1000 ⁇ m, preferably 10 to 350 ⁇ m, particularly preferably 10 to 200 ⁇ m.
  • the outer polyester layer, from which the embossing is carried out has a thickness of at least 0.01 ⁇ m, preferably from 0.1 to 10 ⁇ m, very particularly preferably from 0.1 to 5 ⁇ m.
  • the thickness of the intermediate layer is at least 0.5 ⁇ m, preferably between 1 and 100 ⁇ m, particularly preferably between 2 and 40 ⁇ m.
  • the second outer polyester layer which is arranged opposite the side from which the embossing is carried out, has a thickness of at least 1 ⁇ m, preferably from 1 to 100 ⁇ m, particularly preferably from 5 to 50 ⁇ m.
  • copolyesters used as the intermediate layer contain between 5 and 50% by weight of ethylene isophthalate units.
  • polyester intermediate and outer layers are co-extruded, biaxially stretched and heat-set by the customary, generally known methods.
  • the best way to emboss the multilayer film is to bring the film into contact with a structured surface, preferably a roller, under sufficient pressure, the structure of which is then transferred to the three-layer film.
  • Point-shaped or line-shaped elevations of 5 to 50 ⁇ m in height and an average diameter or width of 5 to 20 ⁇ m have been found to be suitable structures that are uniformly distributed over the entire length and width of the embossing film.
  • the number of these surveys per mm2 should - depending on the diameter / width - be approximately 100 to 25.
  • the embossing film can be given a groove-like or wave-like profile, for example in the form of, for example, concentric rings, etc. It is crucial that the total contact area is reduced by pressing in (embossing) surface areas so that a point or surface bearing web-shaped elevations arises.
  • the shape of this embossing plays a subordinate role here.
  • the cover is expediently applied to the pressure-sensitive, self-adhesive surface by contacting both surfaces.
  • the cover is expediently fed to the adhesive tape as a film tape of the same width shortly before it is rolled up on the side provided with adhesive and rolled up together with the adhesive tape.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

A process for producing covered pressure-sensitive self-adhesive carriers is described, the carrier being covered with an embossed film on the surface treated so as to be pressure-sensitive and self-adhesive.

Description

Die Erfindung betrifft selbstklebend ausgerüstete und drucksensitiv eingestellte Materialien (Klebebänder), die auf ihrer selbstklebenden Oberfläche mit einer Abdeckung versehen sind, welche sich leicht entfernen läßt, kein Silikon enthält, hochfest ist und recyclebar ist.The invention relates to self-adhesive and pressure-sensitive materials (adhesive tapes) which are provided on their self-adhesive surface with a cover which can be easily removed, contains no silicone, is high-strength and can be recycled.

Selbstklebend ausgerüstete sowie drucksensitiv eingestellte Materialien (bspw. Klebebänder) müssen häufig während des Herstellungsprozesses, Transports und bei der Lagerung an ihrer (klebe)aktiven Oberfläche reversibel abgedeckt werden, um ein Verkleben mit sich selbst zu verhindern. Darüber hinaus ermöglichen solche Abdeckungen beispielsweise eine gezielte Einstellung des Abrollwiderstandes, was insbesondere beim maschinellen Einsatz von Klebebandrollen in automatischen Verpackungsanlagen von ausschlaggebender Bedeutung ist.Self-adhesive and pressure-sensitive materials (e.g. adhesive tapes) often have to be reversibly covered on the (adhesive) active surface during the manufacturing process, transport and storage in order to prevent them from sticking to themselves. In addition, such covers allow, for example, a targeted adjustment of the rolling resistance, which is of crucial importance, in particular, when machine use of adhesive tape rolls in automatic packaging systems.

Übliche reversible Abdeckungen enthalten gewöhnlich silikonhaltige Beschichtungen, die kleberabweisend sind. Solche silikonhaltigen Abdeckungen weisen jedoch eine Reihe von Nachteilen auf. Zum einen läßt sich nicht generell ausschließen, daß Spuren des Silikons beim Abziehen der Abdeckung an der Kleberschicht haften bleiben, wodurch die Haftung des Klebers im Kontakt zu einem neuen Untergrund reduziert wird. Zum anderen stehen die Silikone einer Rückgewinnung des reinen als Träger (Abdeckung) verwendeten Materials im Wege. Eine Entsorgung derartig silikonisierter Materialien ist nur über Deponieren oder Verbrennen möglich. Eine thermische Umformung scheidet bei silikonhaltigem Material aus.Usual reversible covers usually contain silicone-containing coatings that are adhesive-repellent. Such silicone-containing covers, however, have a number of disadvantages. On the one hand, it cannot be generally ruled out that traces of the silicone stick to the adhesive layer when the cover is pulled off, as a result of which the adhesion of the adhesive in contact with a new substrate is reduced. On the other hand, the silicones stand in the way of recovery of the pure material used as the carrier (cover). Such siliconized materials can only be disposed of via landfill or incineration. Thermal forming is ruled out for silicone-containing material.

Es bestand deshalb die Aufgabe, eine Abdeckung für Klebebänder zur Verfügung zu stellen, die von ihrem Eigenschaftsprofil her silikonisierten-Trägern in nichts nachsteht, jedoch die obenbeschriebenen Nachteile der silikonisierten Träger nicht aufweist.The object was therefore to provide a cover for adhesive tapes which is in no way inferior in terms of its property profile to siliconized carriers, but which does not have the disadvantages of the siliconized carriers described above.

Gelöst wird diese Aufgabe durch einen abgedeckten drucksensitiven selbstklebenden Träger, der auf der drucksensitiv selbstklebend ausgerüsteten Oberfläche mit einer geprägten Prägefolie abgedeckt ist.This task is solved by a covered pressure-sensitive self-adhesive carrier, which is covered with an embossed embossing foil on the surface which is equipped with pressure-sensitive self-adhesive.

Die Erfindung betrifft weiterhin ein Verfahren zur Herstellung der abgedeckten Träger sowie die Verwendung einer geprägten Prägefolie als Abdeckfolie für selbstklebende Träger.The invention further relates to a method for producing the covered carrier and the use of an embossed embossing film as a cover film for self-adhesive carriers.

Drucksensitive selbstklebende Träger sind hinlänglich bekannt und beispielsweise in der EP-A-0 028 771 beschrieben. Prägbare Polyesterfolien sind ebenfalls bekannt (EP-A-0 115 033). In der nicht vorveröffentlichten deutschen Anmeldung P 41 33 142.7 wird vorgeschlagen, die geprägte Prägefolie gemäß EP-A-0 115 033 als Trennfolie zur Herstellung oberflächlich strukturierter, dekorativer Schichten einzusetzen. Ein Hinweis auf einen möglichen Einsatz solcher geprägten Folien als Abdeckung für selbstklebende Träger findet sich nicht.Pressure-sensitive self-adhesive carriers are well known and are described, for example, in EP-A-0 028 771. Embossable polyester films are also known (EP-A-0 115 033). In the unpublished German application P 41 33 142.7 it is proposed to use the embossed embossing film according to EP-A-0 115 033 as a release film for the production of surface-structured, decorative layers. There is no indication of a possible use of such embossed foils as a cover for self-adhesive supports.

Unter Abdeckung im erfindungsgemäßen Sinn wird ein Material verstanden, welches die Klebeschicht eines haftend ausgerüsteten Trägers schützt und auf Wunsch entfernt werden kann, ohne die Klebeschicht und/oder den Träger zumindest wesentlich zu schädigen.Covering in the sense of the invention is understood to mean a material which protects the adhesive layer of an adhesive-finished carrier and can, if desired, be removed without at least substantially damaging the adhesive layer and / or the carrier.

Unter Träger wird ein Gebilde verstanden, welches zumindest auf einer Oberfläche mit einer selbstklebenden Beschichtung versehen ist, welche den Träger durch einfache Ausübung von Druck (drucksensitiv) mit einem Substrat mehr oder weniger fest verbindet. Im besonderen wird unter Träger eine Klebebandfolie verstanden, die gewöhnlich aus einen ein- oder mehrlagigen thermoplastischen Kunststoff wie Polyvinylchlorid, Polypropylen oder Polyethylenterephthalat besteht und einseitig mit einem drucksensitiven Kleber beschichtet ist. Drucksensitiv heißt hierbei, daß die Klebewirkung ohne Temperaturerhöhung oder zuzusetzende Additive durch einfache Druckeinwirkung erzielt wird (selbstklebend).A carrier is understood to be a structure which is provided at least on one surface with a self-adhesive coating which the carrier is coated with by simply exerting pressure (pressure-sensitive) More or less firmly connects the substrate. In particular, carrier is understood to mean an adhesive tape film which usually consists of a single- or multi-layer thermoplastic such as polyvinyl chloride, polypropylene or polyethylene terephthalate and is coated on one side with a pressure-sensitive adhesive. Pressure-sensitive here means that the adhesive effect is achieved by simply applying pressure without an increase in temperature or additives to be added (self-adhesive).

Grundlage der Erfindung ist eine prägbare, gestreckte und thermofixierte Mehrschichtfolie aus Polyestern mit unterschiedlichen Schmelzpunkten, umfassend zwei außenliegende Polyesterschichten aus Polyethylenterephthalat, zwischen die eine niedriger schmelzende Polyesterschicht aus Copolyestern mit Ethylenterephthalat und Ethylenisophthalateinheiten eingebettet ist. Eine solche prägbare Mehrschichtfolie ist in der EP-A-0 115 033 beschrieben, auf die an dieser Stelle ausdrücklich Bezug genommen wird. Sie kann beispielsweise als ungeprägte Folie auf einen Träger, beispielsweise einen Bucheinband, aufkaschiert und anschließend unter Druck- und Temperatureinwirkung geprägt werden, wodurch ein gewünschtes reliefartiges Muster entsteht.The basis of the invention is an embossable, stretched and heat-set multilayer film made of polyesters with different melting points, comprising two outer polyester layers made of polyethylene terephthalate, between which a lower-melting polyester layer made of copolyesters with ethylene terephthalate and ethylene isophthalate units is embedded. Such an embossable multilayer film is described in EP-A-0 115 033, to which reference is expressly made here. It can, for example, be laminated onto a carrier, for example a book cover, as an unembossed film and then embossed under the influence of pressure and temperature, which creates a desired relief-like pattern.

Es wurde nun überraschend gefunden, daß sich diese prägbare Folie hervorragendals Abdeckfolie für drucksensitive selbstklebende Träger eignet. Dazu wird die prägbare Folie gemäß EP-A-0 115 033 mit dem gewünschten Muster, beispielsweise kleinen, gleichmäßig über die Folienoberfläche verteilten Erhebungen, geprägt. Der Vorteil bei dieser Folie ist insbesondere darin zu sehen, daß sie

  • a) nicht silikonhaltig ist,
  • b) die geringe Haftung zwischen Kleberschicht und Abdeckfolie durch Minimierung der Kontaktfläche erreicht (kleine Erhebungen),
  • c) hochfest ist, und
  • d) sortenrein und somit recyclefähig ist.
It has now surprisingly been found that this embossable film is outstandingly suitable as a cover film for pressure-sensitive self-adhesive supports. For this purpose, the embossable film according to EP-A-0 115 033 is embossed with the desired pattern, for example small elevations evenly distributed over the film surface. The advantage of this film can be seen in the fact that it
  • a) does not contain silicone,
  • b) the low adhesion between the adhesive layer and cover film is achieved by minimizing the contact area (small elevations),
  • c) is high strength, and
  • d) is pure and therefore recyclable.

Die prägbare Polyesterfolie ist eine Mehrschichtfolie, deren kennzeichnende Merkmale darin zu sehen sind, daß die Folie biaxial gestreckt ist und, daß die Zwischenschicht aus einem Copolyester besteht, der zwischen 5 und 95 Gew.-% Ethylenisophthalateinheiten enthält. Es ist bevorzugt, daß die außenliegende Polyesterschicht, von der die Prägung ausgehend vorgenommen wird, in ihrer Stärke dünner ist als die zweite außenliegende Polyesterschicht.The embossable polyester film is a multilayer film, the characteristic features of which can be seen in the fact that the film is biaxially stretched and that the intermediate layer consists of a copolyester which contains between 5 and 95% by weight of ethylene isophthalate units. It is preferred that the outer polyester layer from which the embossing is made is thinner in thickness than the second outer polyester layer.

Es hat sich gezeigt, daß durch Abdeckung der den niedrigeren Schmelzpunkt aufweisenden Mittelschicht durch die höher schmelzenden Polyesterschichten die Verprägbarkeit sehr gut ist, daß keine Klebeneigung zum Werkzeug während des Prägevorganges entsteht und daß höhere Temperaturen beim Prägevorgang angewandt werden können, so daß die Prägetiefe auch bei Belastung bei höheren Temperaturen erhalten bleibt.It has been shown that by covering the middle layer having the lower melting point with the higher melting polyester layers, the embossability is very good, that there is no tendency to stick to the tool during the embossing process and that higher temperatures can be used during the embossing process, so that the embossing depth also The load remains at higher temperatures.

In bevorzugter Weise wird für die Außenschicht Polyethylenterephthalat mit einer Schmelztemperatur zwischen 240 und 260 °C und für die Zwischenschicht ein Copolyester mit einer Schmelztemperatur zwischen 190 und 230 °C eingesetzt.Polyethylene terephthalate with a melting temperature between 240 and 260 ° C. is preferably used for the outer layer and a copolyester with a melting temperature between 190 and 230 ° C. is used for the intermediate layer.

Die Mehrschichtfolie besitzt bevorzugt einen asymmetrischen Aufbau; dabei ist die außenliegende Polyesterschicht, von der aus die Prägung vorgenommen wird, in ihrer Stärke dünner als die zweite außenliegende Polyesterschicht, welche der Seite, von der die Prägung vorgenommen wird, gegenüber angeordnet ist. Die Dicke der Mehrschichtfolie beträgt 5 bis 1000 µm, vorzugsweise 10 bis 350 µm, besonders bevorzugt 10 bis 200 µm. Dabei weist die außenliegende Polyesterschicht, von der die Prägung ausgehend vorgenommen wird, eine Dicke von wenigstens 0,01 µm auf, bevorzugt von 0,1 bis 10 µm, ganz besondere bevorzugt von 0,1 bis 5 µm. Die Dicke der Zwischenschicht beträgt wenigstens 0,5 µm, bevorzugt liegt sie zwischen 1 und 100 µm, besonders bevorzugt zwischen 2 und 40 µm. Die zweite außenliegende Polyesterschicht, welche der Seite, von der die Prägung vorgenommen wird, gegenüber angeordnet ist, weist eine Dicke von wenigstens 1 µm auf, bevorzugt von 1 bis 100 µm, besonders bevorzugt von 5 bis 50 µm.The multilayer film preferably has an asymmetrical structure; the outside polyester layer from which the embossing is made is thinner than the second outside polyester layer, which is arranged opposite the side from which the embossing is made. The thickness of the multilayer film is 5 to 1000 μm, preferably 10 to 350 μm, particularly preferably 10 to 200 μm. The outer polyester layer, from which the embossing is carried out, has a thickness of at least 0.01 µm, preferably from 0.1 to 10 µm, very particularly preferably from 0.1 to 5 µm. The thickness of the intermediate layer is at least 0.5 μm, preferably between 1 and 100 μm, particularly preferably between 2 and 40 μm. The second outer polyester layer, which is arranged opposite the side from which the embossing is carried out, has a thickness of at least 1 μm, preferably from 1 to 100 μm, particularly preferably from 5 to 50 μm.

Bevorzugt ist außerdem, daß die als Zwischenschicht eingesetzten Copolyester zwischen 5 und 50 Gew.-% Ethylenisophthalateinheiten enthalten.It is also preferred that the copolyesters used as the intermediate layer contain between 5 and 50% by weight of ethylene isophthalate units.

Die Polyesterzwischen- und -außenschichten werden nach den üblichen, allgemein bekannten Verfahren coextrudiert, biaxial gestreckt und thermofixiert.The polyester intermediate and outer layers are co-extruded, biaxially stretched and heat-set by the customary, generally known methods.

Bei der Prägung der Mehrschichtfolie geht man am besten so vor, daß man die Folie unter ausreichendem Druck in Kontakt mit einer strukturierten Fläche, bevorzugt einer Walze, bringt, deren Struktur sich dann auf die Dreischichtfolie überträgt.The best way to emboss the multilayer film is to bring the film into contact with a structured surface, preferably a roller, under sufficient pressure, the structure of which is then transferred to the three-layer film.

Als geeignete Strukturen haben sich gleichmäßig über die gesamte Länge und Breite der Prägefolie verteilte punkt- oder linienförmige Erhebungen von 5 bis 50 µm Höhe und einem mittleren Durchmesser beziehungsweise Breite von 5 bis 20 µm erwiesen. Die Anzahl dieser Erhebungen pro mm² sollte - je nach Durchmesser/Breite - ca. 100 bis 25 betragen. Zur Erzeugung von linienförmigen Erhebungen kann man der Prägefolie ein rillen- bzw. wellenartiges Profil, beispielsweise in Form von z.B. konzentrischen Ringen, etc. verleihen. Entscheidend ist, daß die Gesamtkontaktfläche durch Eindrücken (Prägen) von Flächenbereichen verringert wird, so daß eine nur punkt- bzw. stegförmige Erhebungen tragende Oberfläche entsteht. Die Form dieser Prägung spielt hierbei eine untergeordnete Rolle.Point-shaped or line-shaped elevations of 5 to 50 μm in height and an average diameter or width of 5 to 20 μm have been found to be suitable structures that are uniformly distributed over the entire length and width of the embossing film. The number of these surveys per mm² should - depending on the diameter / width - be approximately 100 to 25. To create linear elevations, the embossing film can be given a groove-like or wave-like profile, for example in the form of, for example, concentric rings, etc. It is crucial that the total contact area is reduced by pressing in (embossing) surface areas so that a point or surface bearing web-shaped elevations arises. The shape of this embossing plays a subordinate role here.

Das Aufbringen der Abdeckung auf die drucksensitiv selbstklebend ausgerüstete Oberfläche erfolgt zweckmäßig durch Kontaktieren beider Oberflächen. Im Falle von selbstklebend ausgerüsteten Klebebändern wird die Abdeckung zweckmäßigerweise als gleichbreites Folienband dem Klebeband nach dessen Herstellung kurz vor der Aufrollung auf der mit Klebstoff ausgerüsteten Seite zugeführt und zusammen mit dem Klebeband aufgerollt.The cover is expediently applied to the pressure-sensitive, self-adhesive surface by contacting both surfaces. In the case of self-adhesive tapes, the cover is expediently fed to the adhesive tape as a film tape of the same width shortly before it is rolled up on the side provided with adhesive and rolled up together with the adhesive tape.

Gegenüber herkömmlichen Abdeckungen für selbstklebende Träger oder auch gegenüber Klebebändern, die selbst auf der Rückseite mit einem Antihaftmittel ausgerüstet sind, weist die erfindungsgemäße Kombination von geprägter Abdeckfolie und Klebeband die folgenden Vorteile auf:

  • a) das Gesamtsystem ist silikonfrei,
  • b) die Abdeckfolie kann wiederverwendet bzw. recycliert werden,
  • c) die Haftkraft zwischen selbstklebendem Träger und Abdeckfolie kann durch entsprechende Prägung der Abdeckfolie in weiten Grenzen eingestellt werden,
  • d) die verwendete Abdeckfolie ist hochfest.
Compared to conventional covers for self-adhesive carriers or also to adhesive tapes that are even equipped on the back with a non-stick agent, the combination of embossed cover film and adhesive tape according to the invention has the following advantages:
  • a) the entire system is silicone-free,
  • b) the cover film can be reused or recycled,
  • c) the adhesive force between the self-adhesive carrier and the cover film can be set within wide limits by embossing the cover film accordingly,
  • d) the cover film used is high strength.

Claims (8)

Abgedeckter drucksensitiver selbstklebender Träger, dadurch gekennzeichnet, daß der Träger auf der drucksensitiv selbstklebend ausgerüsteten Oberfläche mit einer geprägten Prägefolie abgedeckt ist.Covered pressure-sensitive self-adhesive carrier, characterized in that the carrier is covered on the pressure-sensitive self-adhesive surface with an embossed stamping foil. Abgedeckter selbstklebender Träger nach Anspruch 1, dadurch gekennzeichnet, daß der Träger eine Folie aus thermoplastischem Kunststoff ist.Covered self-adhesive carrier according to claim 1, characterized in that the carrier is a film made of thermoplastic material. Abgedeckter selbstklebender Träger nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die geprägte Prägefolie eine geprägte, biaxial orientierte und thermofixierte Mehrschichtfolie aus Polyestern ist, wobei diese Folie zwei außenliegende Polyesterschichten aus Polyethylenterephthalat umfaßt, zwischen die eine niedriger schmelzende Polyesterschicht aus einem Copolyester mit Ethylenterephthalat- und Ethylenisophthalateinheiten eingebettet ist.Covered self-adhesive carrier according to claim 1 or 2, characterized in that the embossed embossing film is an embossed, biaxially oriented and heat-set multilayer film made of polyesters, this film comprising two outer polyester layers made of polyethylene terephthalate, between which a lower-melting polyester layer made of a copolyester with ethylene terephthalate and ethylene isophthalate units is embedded. Abgedeckter selbstklebender Träger nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Gesamtstärke der prägbaren Prägefolie 5 bis 1000 µm beträgt, wobei die Stärke der Zwischenschicht wenigstens 0,5 µm beträgt.Covered self-adhesive carrier according to one or more of claims 1 to 3, characterized in that the total thickness of the embossable embossing film is 5 to 1000 µm, the thickness of the intermediate layer being at least 0.5 µm. Abgedeckter selbstklebender Träger nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die geprägte Prägefolie Erhebungen von 5 bis 20 µm aufweist.Covered self-adhesive carrier according to one or more of claims 1 to 4, characterized in that the embossed stamping film has elevations of 5 to 20 µm. Abgedeckter selbstklebender Träger nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Erhebungen punktoder linienförmig sind und daß 25 bis 100 Erhebungen pro mm² vorhanden sind.Covered self-adhesive carrier according to one or more of claims 1 to 5, characterized in that the elevations point or are linear and that there are 25 to 100 bumps per mm². Verfahren zur Herstellung von abgedeckten drucksensitive selbstklebenden Trägern, dadurch gekennzeichnet, daß auf die drucksensitiv selbstklebend ausgerüstete Oberfläche eines Trägers eine geprägte Prägefolie aufgebracht wird.Process for the production of covered pressure-sensitive self-adhesive carriers, characterized in that an embossed embossing foil is applied to the surface of a carrier which is provided with a pressure-sensitive self-adhesive. Verwendung einer geprägten Prägefolie als recyclebare Abdeckfolie für drucksensitive selbstklebende Träger.Use of an embossed stamping foil as a recyclable cover foil for pressure-sensitive self-adhesive carriers.
EP93104413A 1992-03-25 1993-03-18 Covered pressure-sensitive self-adhesive carrier and method of manufacturing it Withdrawn EP0562448A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4209676A DE4209676A1 (en) 1992-03-25 1992-03-25 Covered pressure-sensitive self-adhesive carriers and processes for their production
DE4209676 1992-03-25

Publications (1)

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EP0562448A1 true EP0562448A1 (en) 1993-09-29

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EP (1) EP0562448A1 (en)
JP (1) JPH0623916A (en)
KR (1) KR930019790A (en)
CA (1) CA2092281A1 (en)
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MX (1) MX9301693A (en)

Cited By (3)

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EP0798229A1 (en) * 1996-03-25 1997-10-01 4P Folie Forchheim GmbH Packaging wrapper
EP1034762A2 (en) * 1999-03-06 2000-09-13 4P Folie Forchheim GmbH Packaging wrapper
WO2007117208A1 (en) * 2006-04-11 2007-10-18 Mölnlycke Health Care Ab Article or component of a medical and technical nature for affixing a medical article or part thereof to skin, provided with a releasable protection layer

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DE19851104C2 (en) 1998-11-06 2003-04-03 Huhtamaki Forchheim Process for producing a multilayer composite
KR100423582B1 (en) * 2002-01-18 2004-03-22 주식회사지엠피 Laminate sheet layer capble of giving media adhesive function
US6755878B2 (en) 2002-08-02 2004-06-29 3M Innovative Properties Company Abrasive articles and methods of making and using the same
KR100860651B1 (en) * 2007-10-04 2008-09-26 엘지전자 주식회사 Dust separating apparatus of vacuum cleaner
DE102011101510B4 (en) * 2011-05-13 2014-07-24 Sartorius Stedim Biotech Gmbh Sealing and method for sealing acting as a sterile barrier and use of a pressure-sensitive adhesive
US10099462B2 (en) * 2013-06-28 2018-10-16 Toray Plastics (America), Inc. Releasable polyester high gloss metal transfer film
US9630385B2 (en) 2012-11-08 2017-04-25 Toray Plastics (America), Inc. Releasable polyester metal transfer film

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0798229A1 (en) * 1996-03-25 1997-10-01 4P Folie Forchheim GmbH Packaging wrapper
EP1034762A2 (en) * 1999-03-06 2000-09-13 4P Folie Forchheim GmbH Packaging wrapper
EP1034762A3 (en) * 1999-03-06 2002-02-06 4P Folie Forchheim GmbH Packaging wrapper
CZ298254B6 (en) * 1999-03-06 2007-08-08 4P Folie Forchheim Gmbh Packaging sleeve
WO2007117208A1 (en) * 2006-04-11 2007-10-18 Mölnlycke Health Care Ab Article or component of a medical and technical nature for affixing a medical article or part thereof to skin, provided with a releasable protection layer
AU2007235708B2 (en) * 2006-04-11 2012-05-24 Molnlycke Health Care Ab Article or component of a medical and technical nature for affixing a medical article or part thereof to skin, provided with a releasable protection layer
CN101437479B (en) * 2006-04-11 2012-07-18 莫恩里克保健股份公司 Article or component of a medical and technical nature for affixing a medical article or part thereof to skin, provided with a releasable protection layer
US8530022B2 (en) 2006-04-11 2013-09-10 Molnlycke Health Care Ab Article or component of a medical and technical nature for affixing a medical article or part thereof to skin, provided with a releasable protection layer

Also Published As

Publication number Publication date
CA2092281A1 (en) 1993-09-26
KR930019790A (en) 1993-10-18
DE4209676A1 (en) 1993-09-30
MX9301693A (en) 1993-09-01
JPH0623916A (en) 1994-02-01

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